Hi guys ! I was wondering: Since I installed the calamity drivers for my graphic card to display 15Hz, how come when I run a game that requires 31 Hz, it still works? For example, Xii Stag runs under groovyMAME in my MAMECab. Is this normal?

Anyway, I still have a problem : every time i launch a game (and pretty much all of my games are in 15Hz), we can hear that there is a clatter (most likely a frequency change)But here's my configuration :

Windows 7, Radeon HD5450, Calamity Drivers+CRT Emudriver to display 15Hz with my graphics card, GroovyMAME 0.205, Hyperspin)-> How is it that the screen changes frequency when i launch a game since everything is in 15Hz?

And just for the info : the clatter occurs even when I run from a command line so i'm not sure that Hyperspin is to blame.

Gandalf68, it's kHz, not Hz.

Your log shows your desktop is set to 31 kHz, as expected because you're using a tri-sync preset. So yes, the frequency switch is happening right between the desktop (or frontend) and GM.

In order to eliminate that problem, you may want to configure your desktop with a 15 kHz mode. The problem is all 15 kHz modes in your mode list are super resolutions (not suitable for desktop or frontend).

You need to add a 4:3, 15kHz mode. It will be interlaced, it will flicker, and you will complain

Don't worry, i can easily accept the flicker on the desktop because after all, i'm using the MameCAb only to run MAME in Hyperspin. Once the clatter problem solved, i will configure Hypespin to be launch at Windows start, and i would not really need to use windows anymore after that.

So what is the procedure to add a 4:3, 15kHz (Thank you for the correction ) mode and to configure my desktop so it will use it ?

Why 648x486? Because this way you don't overlap your existing 31 kHz 640x480 (I think it's good you keep this one as 31 kHz considering the monitor you have and some systems will benefit from it, and also having it editable by not making it the desktop's mode).

I have just set the tri-sync preset, then generate mode and install them, but now my display is cropped and the only choices in Windows display properties dialog are super resolutions or 576x720 (wich is the one i'm using) Is it normal ?

Do i have to redo what you suggested now ? In order to get the 648x486@60 for the desktop ?

Sorry I didn't imagine you were using beta 14. For the commands I posted to work right, you actually need beta 15. No need to update the driver, just download the separate CRT tools an repeat the process.

My initial instructions were supposed to be done on a second VMMaker's session, once you had your modes installed, that's why it's not running this way. Now, since you're going to have to start again, do it in a single VMMaker's session, this way:

Ok, that's normal, you're running a vertical game and it's trying to use your 25 kHz range to show the game's 384 lines height. So you still have a frequency switch between your desktop (15 kHz) and the game (25 kHz).

It's already done -> i pivoted my monitor in vertical position (TATE) because i want to use this MAMECab exclusively for vertical games

Man, this changes everything.

Ok, I noticed you were rotating the modes using the internal UI. Don't do that (you'll need to wipe out MAME's cfg folder to remove the old settings). Instead, what you want to do is to rotate your desktop. Do it from Windows display settings dialog.

Don't touch VMMaker, your installed modes should keep valid.

Then, in mame.ini, set "orientation rotate_r" or "orientation rotate_l" (if one makes the picture upside down choose the other).

FYI : i did all the things you said with my desktop turned 90 degrees from the beginning (so I'm forced to lean my head to the left) because I thought it might confuse GroovyMAME otherwise.

And I have already configured my fronted so that it is displayed vertically (long and tough work, but the result is nice)

So when you ask me to rotate my desktop, what do you mean exactly ? Do i have to rotate it so i can see Windows displayed normally, or should i leave it like it is right now ? (Rotate 90 degrees to the left)

I just removed the line "orientation rotate_r" that I created, and I changed the word "horizontal" by "vertical" in the core switchres options but the clatter still occurs when i launch GroovyMAME, and when i launch a game.That, plus the game llook crushed too